title: Localization of Ca(2+)-binding S100 proteins in epithelial tumours of the skin.
abstract: The Ca(2+)-binding proteins S100A1, S100A2, S100A4, S100A6 and S100B were evaluated immunohistochemically in normal skin and skin appendage tumours. Epidermal basal cells, epithelial cells of sebaceous glands, hair follicle sheet epithelia and eccrine duct reacted strongly with an antiserum against human S100A2 but were nonreactive or weakly reactive to S100A1, S100A4, S100A6 and S100B. Varying types of skin appendage tumours and most peripheral cells in tumour nests of basal cell carcinoma and squamous cell carcinoma showed positive S100A2 immunoreactivity in neoplastic cells corresponding to basal cells but were nonreactive or faintly reactive for other S100 proteins. Langerhan's cells and melanocytes were labelled by S100B. Basophilic cells of calcifying epithelioma were occasionally stained with S100A2 antiserum. Eccrine poroma did not react with any S100 antiserum. Mixed tumours of the skin containing neoplastic myoepithelial cells stained strongly for S100A2 and S100B but only faintly for S100A1, S100A4, S100A6. This is the first report on selective evaluation of different S100 proteins in normal skin. These antibodies are valuable tools for better characterization of skin appendage tumours.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Asahi University School of Dentistry, Gifu, Japan.
authors.forename: P
authors.initials: P
authors.lastname: Shrestha
authors.forename: Y
authors.initials: Y
authors.lastname: Muramatsu
authors.forename: W
authors.initials: W
authors.lastname: Kudeken
authors.forename: M
authors.initials: M
authors.lastname: Mori
authors.forename: Y
authors.initials: Y
authors.lastname: Takai
authors.forename: E C
authors.initials: EC
authors.lastname: Ilg
authors.forename: B W
authors.initials: BW
authors.lastname: Schafer
authors.forename: C W
authors.initials: CW
authors.lastname: Heizmann
mesh_terms: D000818:Animals; D001491:Basophils / Q000378:metabolism; D002135:Calcium-Binding Proteins / Q000378:metabolism*; D002277:Carcinoma / Q000378:metabolism* / Q000473:pathology; D018859:Hair Follicle / Q000378:metabolism* / Q000473:pathology; D006801:Humans; D007124:Immunoenzyme Techniques; D007801:Langerhans Cells / Q000378:metabolism; D008544:Melanocytes / Q000378:metabolism; D011817:Rabbits; D009418:S100 Proteins; D012626:Sebaceous Gland Neoplasms / Q000378:metabolism* / Q000473:pathology; D012867:Skin / Q000378:metabolism; D012878:Skin Neoplasms / Q000378:metabolism* / Q000473:pathology; D013544:Sweat Gland Neoplasms / Q000378:metabolism* / Q000473:pathology
chemical_list: D002135:Calcium-Binding Proteins; D009418:S100 Proteins; C110294:S100A1 protein